Resolve "Managed model instances"

Closes #715 (closed)

added part::backend workflow::discussing labels

added 1 commit

• 007d38fd - Add managed_by_app_label and manager stub

Compare with previous version

added 1 commit

• 1ba45fb5 - Add utility methods to managed_by manager

Compare with previous version

added 1 commit

• 89084530 - Add utility methods to managed_by manager

Compare with previous version

added 1 commit

• 15492e82 - ALlow retrieving all models

Compare with previous version

added 1 commit

• 1773f0aa - Restructure manager

Compare with previous version

marked this merge request as ready

Closing, as it was already merged into !1208 (merged) by accident.

closed